1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
| // RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=i386-pc-linux | FileCheck -check-prefix LINUX %s
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck -check-prefix WIN32 %s
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=thumb-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck -check-prefix WOA %s
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=x86_64-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck -check-prefix WIN64 %s
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=aarch64-windows-msvc -mconstructor-aliases -fno-rtti | FileCheck -check-prefix WOA64 %s
struct Empty {};
struct EmptyWithCtor {
EmptyWithCtor() {}
};
struct Small {
int x;
};
// This is a C++11 trivial and standard-layout struct but not a C++03 POD.
struct SmallCpp11NotCpp03Pod : Empty {
int x;
};
struct SmallWithCtor {
SmallWithCtor() {}
int x;
};
struct Multibyte {
char a, b, c, d;
};
struct Packed {
short a;
int b;
short c;
};
struct SmallWithDtor {
SmallWithDtor();
~SmallWithDtor();
int x;
};
struct SmallWithVftable {
int x;
virtual void foo();
};
struct Medium {
int x, y;
};
struct MediumWithCopyCtor {
MediumWithCopyCtor();
MediumWithCopyCtor(const struct MediumWithCopyCtor &);
int x, y;
};
struct Big {
int a, b, c, d, e, f;
};
struct BigWithDtor {
BigWithDtor();
~BigWithDtor();
int a, b, c, d, e, f;
};
struct BaseNoByval : Small {
int bb;
};
struct SmallWithPrivate {
private:
int i;
};
// WIN32: declare dso_local void @"{{.*take_bools_and_chars.*}}"
// WIN32: (<{ i8, [3 x i8], i8, [3 x i8], %struct.SmallWithDtor,
// WIN32: i8, [3 x i8], i8, [3 x i8], i32, i8, [3 x i8] }>* inalloca)
void take_bools_and_chars(char a, char b, SmallWithDtor c, char d, bool e, int f, bool g);
void call_bools_and_chars() {
take_bools_and_chars('A', 'B', SmallWithDtor(), 'D', true, 13, false);
}
// Returning structs that fit into a register.
Small small_return() { return Small(); }
// LINUX-LABEL: define void @_Z12small_returnv(%struct.Small* noalias sret %agg.result)
// WIN32: define dso_local i32 @"?small_return@@YA?AUSmall@@XZ"()
// WIN64: define dso_local i32 @"?small_return@@YA?AUSmall@@XZ"()
Medium medium_return() { return Medium(); }
// LINUX-LABEL: define void @_Z13medium_returnv(%struct.Medium* noalias sret %agg.result)
// WIN32: define dso_local i64 @"?medium_return@@YA?AUMedium@@XZ"()
// WIN64: define dso_local i64 @"?medium_return@@YA?AUMedium@@XZ"()
// Returning structs that fit into a register but are not POD.
SmallCpp11NotCpp03Pod small_non_pod_return() { return SmallCpp11NotCpp03Pod(); }
// LINUX-LABEL: define void @_Z20small_non_pod_returnv(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result)
// WIN32: define dso_local void @"?small_non_pod_return@@YA?AUSmallCpp11NotCpp03Pod@@XZ"(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result)
// WIN64: define dso_local void @"?small_non_pod_return@@YA?AUSmallCpp11NotCpp03Pod@@XZ"(%struct.SmallCpp11NotCpp03Pod* noalias sret %agg.result)
SmallWithCtor small_with_ctor_return() { return SmallWithCtor(); }
// LINUX-LABEL: define void @_Z22small_with_ctor_returnv(%struct.SmallWithCtor* noalias sret %agg.result)
// WIN32: define dso_local void @"?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result)
// WIN64: define dso_local void @"?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result)
// FIXME: The 'sret' mark here doesn't seem to be enough to convince LLVM to
// preserve the hidden sret pointer in R0 across the function.
// WOA: define dso_local arm_aapcs_vfpcc void @"?small_with_ctor_return@@YA?AUSmallWithCtor@@XZ"(%struct.SmallWithCtor* noalias sret %agg.result)
SmallWithVftable small_with_vftable_return() { return SmallWithVftable(); }
// LINUX-LABEL: define void @_Z25small_with_vftable_returnv(%struct.SmallWithVftable* noalias sret %agg.result)
// WIN32: define dso_local void @"?small_with_vftable_return@@YA?AUSmallWithVftable@@XZ"(%struct.SmallWithVftable* noalias sret %agg.result)
// WIN64: define dso_local void @"?small_with_vftable_return@@YA?AUSmallWithVftable@@XZ"(%struct.SmallWithVftable* noalias sret %agg.result)
MediumWithCopyCtor medium_with_copy_ctor_return() { return MediumWithCopyCtor(); }
// LINUX-LABEL: define void @_Z28medium_with_copy_ctor_returnv(%struct.MediumWithCopyCtor* noalias sret %agg.result)
// WIN32: define dso_local void @"?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result)
// WIN64: define dso_local void @"?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result)
// WOA: define dso_local arm_aapcs_vfpcc void @"?medium_with_copy_ctor_return@@YA?AUMediumWithCopyCtor@@XZ"(%struct.MediumWithCopyCtor* noalias sret %agg.result)
// Returning a large struct that doesn't fit into a register.
Big big_return() { return Big(); }
// LINUX-LABEL: define void @_Z10big_returnv(%struct.Big* noalias sret %agg.result)
// WIN32: define dso_local void @"?big_return@@YA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result)
// WIN64: define dso_local void @"?big_return@@YA?AUBig@@XZ"(%struct.Big* noalias sret %agg.result)
void small_arg(Small s) {}
// LINUX-LABEL: define void @_Z9small_arg5Small(i32 %s.0)
// WIN32: define dso_local void @"?small_arg@@YAXUSmall@@@Z"(i32 %s.0)
// WIN64: define dso_local void @"?small_arg@@YAXUSmall@@@Z"(i32 %s.coerce)
// WOA: define dso_local arm_aapcs_vfpcc void @"?small_arg@@YAXUSmall@@@Z"([1 x i32] %s.coerce)
void medium_arg(Medium s) {}
// LINUX-LABEL: define void @_Z10medium_arg6Medium(i32 %s.0, i32 %s.1)
// WIN32: define dso_local void @"?medium_arg@@YAXUMedium@@@Z"(i32 %s.0, i32 %s.1)
// WIN64: define dso_local void @"?medium_arg@@YAXUMedium@@@Z"(i64 %s.coerce)
// WOA: define dso_local arm_aapcs_vfpcc void @"?medium_arg@@YAXUMedium@@@Z"([2 x i32] %s.coerce)
void base_no_byval_arg(BaseNoByval s) {}
// LINUX-LABEL: define void @_Z17base_no_byval_arg11BaseNoByval(%struct.BaseNoByval* byval(%struct.BaseNoByval) align 4 %s)
// WIN32: define dso_local void @"?base_no_byval_arg@@YAXUBaseNoByval@@@Z"(i32 %s.0, i32 %s.1)
// WIN64: define dso_local void @"?base_no_byval_arg@@YAXUBaseNoByval@@@Z"(i64 %s.coerce)
// WOA: define dso_local arm_aapcs_vfpcc void @"?base_no_byval_arg@@YAXUBaseNoByval@@@Z"([2 x i32] %s.coerce)
void small_arg_with_ctor(SmallWithCtor s) {}
// LINUX-LABEL: define void @_Z19small_arg_with_ctor13SmallWithCtor(%struct.SmallWithCtor* byval(%struct.SmallWithCtor) align 4 %s)
// WIN32: define dso_local void @"?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"(i32 %s.0)
// WIN64: define dso_local void @"?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"(i32 %s.coerce)
// WOA: define dso_local arm_aapcs_vfpcc void @"?small_arg_with_ctor@@YAXUSmallWithCtor@@@Z"([1 x i32] %s.coerce)
// FIXME: We could coerce to a series of i32s here if we wanted to.
void multibyte_arg(Multibyte s) {}
// LINUX-LABEL: define void @_Z13multibyte_arg9Multibyte(%struct.Multibyte* byval(%struct.Multibyte) align 4 %s)
// WIN32: define dso_local void @"?multibyte_arg@@YAXUMultibyte@@@Z"(%struct.Multibyte* byval(%struct.Multibyte) align 4 %s)
// WIN64: define dso_local void @"?multibyte_arg@@YAXUMultibyte@@@Z"(i32 %s.coerce)
// WOA: define dso_local arm_aapcs_vfpcc void @"?multibyte_arg@@YAXUMultibyte@@@Z"([1 x i32] %s.coerce)
void packed_arg(Packed s) {}
// LINUX-LABEL: define void @_Z10packed_arg6Packed(%struct.Packed* byval(%struct.Packed) align 4 %s)
// WIN32: define dso_local void @"?packed_arg@@YAXUPacked@@@Z"(%struct.Packed* byval(%struct.Packed) align 4 %s)
// WIN64: define dso_local void @"?packed_arg@@YAXUPacked@@@Z"(%struct.Packed* %s)
// Test that dtors are invoked in the callee.
void small_arg_with_dtor(SmallWithDtor s) {}
// WIN32: define dso_local void @"?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(<{ %struct.SmallWithDtor }>* inalloca %0) {{.*}} {
// WIN32: call x86_thiscallcc void @"??1SmallWithDtor@@QAE@XZ"
// WIN32: }
// WIN64: define dso_local void @"?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(i32 %s.coerce) {{.*}} {
// WIN64: call void @"??1SmallWithDtor@@QEAA@XZ"
// WIN64: }
// WOA64: define dso_local void @"?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(i64 %s.coerce) {{.*}} {
// WOA64: call void @"??1SmallWithDtor@@QEAA@XZ"(%struct.SmallWithDtor* %s)
// WOA64: }
// FIXME: MSVC incompatible!
// WOA: define dso_local arm_aapcs_vfpcc void @"?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(%struct.SmallWithDtor* %s) {{.*}} {
// WOA: call arm_aapcs_vfpcc void @"??1SmallWithDtor@@QAA@XZ"(%struct.SmallWithDtor* %s)
// WOA: }
// Test that the eligible non-aggregate is passed directly, but returned
// indirectly on ARM64 Windows.
// WOA64: define dso_local void @"?small_arg_with_private_member@@YA?AUSmallWithPrivate@@U1@@Z"(%struct.SmallWithPrivate* inreg noalias sret %agg.result, i64 %s.coerce) {{.*}} {
SmallWithPrivate small_arg_with_private_member(SmallWithPrivate s) { return s; }
void call_small_arg_with_dtor() {
small_arg_with_dtor(SmallWithDtor());
}
// WIN64-LABEL: define dso_local void @"?call_small_arg_with_dtor@@YAXXZ"()
// WIN64: call %struct.SmallWithDtor* @"??0SmallWithDtor@@QEAA@XZ"
// WIN64: call void @"?small_arg_with_dtor@@YAXUSmallWithDtor@@@Z"(i32 %{{.*}})
// WIN64: ret void
// Test that references aren't destroyed in the callee.
void ref_small_arg_with_dtor(const SmallWithDtor &s) { }
// WIN32: define dso_local void @"?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"(%struct.SmallWithDtor* dereferenceable({{[0-9]+}}) %s) {{.*}} {
// WIN32-NOT: call x86_thiscallcc void @"??1SmallWithDtor@@QAE@XZ"
// WIN32: }
// WIN64-LABEL: define dso_local void @"?ref_small_arg_with_dtor@@YAXAEBUSmallWithDtor@@@Z"(%struct.SmallWithDtor* dereferenceable({{[0-9]+}}) %s)
void big_arg_with_dtor(BigWithDtor s) {}
// WIN64-LABEL: define dso_local void @"?big_arg_with_dtor@@YAXUBigWithDtor@@@Z"(%struct.BigWithDtor* %s)
// WIN64: call void @"??1BigWithDtor@@QEAA@XZ"
// WIN64: }
void call_big_arg_with_dtor() {
big_arg_with_dtor(BigWithDtor());
}
// We can elide the copy of the temporary in the caller, because this object is
// larger than 8 bytes and is passed indirectly.
// WIN64-LABEL: define dso_local void @"?call_big_arg_with_dtor@@YAXXZ"()
// WIN64: call %struct.BigWithDtor* @"??0BigWithDtor@@QEAA@XZ"
// WIN64: call void @"?big_arg_with_dtor@@YAXUBigWithDtor@@@Z"(%struct.BigWithDtor* %{{.*}})
// WIN64-NOT: call void @"??1BigWithDtor@@QEAA@XZ"
// WIN64: ret void
// Test that temporaries passed by reference are destroyed in the caller.
void temporary_ref_with_dtor() {
ref_small_arg_with_dtor(SmallWithDtor());
}
// WIN32: define dso_local void @"?temporary_ref_with_dtor@@YAXXZ"() {{.*}} {
// WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"??0SmallWithDtor@@QAE@XZ"
// WIN32: call void @"?ref_small_arg_with_dtor@@YAXABUSmallWithDtor@@@Z"
// WIN32: call x86_thiscallcc void @"??1SmallWithDtor@@QAE@XZ"
// WIN32: }
void takes_two_by_val_with_dtor(SmallWithDtor a, SmallWithDtor b);
void eh_cleanup_arg_with_dtor() {
takes_two_by_val_with_dtor(SmallWithDtor(), SmallWithDtor());
}
// When exceptions are off, we don't have any cleanups. See
// microsoft-abi-exceptions.cpp for these cleanups.
// WIN32: define dso_local void @"?eh_cleanup_arg_with_dtor@@YAXXZ"() {{.*}} {
// WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"??0SmallWithDtor@@QAE@XZ"
// WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"??0SmallWithDtor@@QAE@XZ"
// WIN32: call void @"?takes_two_by_val_with_dtor@@YAXUSmallWithDtor@@0@Z"
// WIN32-NOT: call x86_thiscallcc void @"??1SmallWithDtor@@QAE@XZ"
// WIN32: }
void small_arg_with_vftable(SmallWithVftable s) {}
// LINUX-LABEL: define void @_Z22small_arg_with_vftable16SmallWithVftable(%struct.SmallWithVftable* %s)
// WIN32: define dso_local void @"?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(<{ %struct.SmallWithVftable }>* inalloca %0)
// WIN64: define dso_local void @"?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(%struct.SmallWithVftable* %s)
// WOA64: define dso_local void @"?small_arg_with_vftable@@YAXUSmallWithVftable@@@Z"(%struct.SmallWithVftable* %s)
void medium_arg_with_copy_ctor(MediumWithCopyCtor s) {}
// LINUX-LABEL: define void @_Z25medium_arg_with_copy_ctor18MediumWithCopyCtor(%struct.MediumWithCopyCtor* %s)
// WIN32: define dso_local void @"?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(<{ %struct.MediumWithCopyCtor }>* inalloca %0)
// WIN64: define dso_local void @"?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(%struct.MediumWithCopyCtor* %s)
// WOA: define dso_local arm_aapcs_vfpcc void @"?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(%struct.MediumWithCopyCtor* %s)
// WOA64: define dso_local void @"?medium_arg_with_copy_ctor@@YAXUMediumWithCopyCtor@@@Z"(%struct.MediumWithCopyCtor* %s)
void big_arg(Big s) {}
// LINUX-LABEL: define void @_Z7big_arg3Big(%struct.Big* byval(%struct.Big) align 4 %s)
// WIN32: define dso_local void @"?big_arg@@YAXUBig@@@Z"(%struct.Big* byval(%struct.Big) align 4 %s)
// WIN64: define dso_local void @"?big_arg@@YAXUBig@@@Z"(%struct.Big* %s)
// PR27607: We would attempt to load i32 value out of the reference instead of
// just loading the pointer from the struct during argument expansion.
struct RefField {
RefField(int &x);
int &x;
};
void takes_ref_field(RefField s) {}
// LINUX-LABEL: define void @_Z15takes_ref_field8RefField(%struct.RefField* byval(%struct.RefField) align 4 %s)
// WIN32: define dso_local void @"?takes_ref_field@@YAXURefField@@@Z"(i32* %s.0)
// WIN64: define dso_local void @"?takes_ref_field@@YAXURefField@@@Z"(i64 %s.coerce)
void pass_ref_field() {
int x;
takes_ref_field(RefField(x));
}
// LINUX-LABEL: define void @_Z14pass_ref_fieldv()
// LINUX: call void @_Z15takes_ref_field8RefField(%struct.RefField* byval(%struct.RefField) align 4 %{{.*}})
// WIN32-LABEL: define dso_local void @"?pass_ref_field@@YAXXZ"()
// WIN32: call void @"?takes_ref_field@@YAXURefField@@@Z"(i32* %{{.*}})
// WIN64-LABEL: define dso_local void @"?pass_ref_field@@YAXXZ"()
// WIN64: call void @"?takes_ref_field@@YAXURefField@@@Z"(i64 %{{.*}})
class Class {
public:
Small thiscall_method_small() { return Small(); }
// LINUX: define {{.*}} void @_ZN5Class21thiscall_method_smallEv(%struct.Small* noalias sret %agg.result, %class.Class* %this)
// WIN32: define {{.*}} x86_thiscallcc void @"?thiscall_method_small@Class@@QAE?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_small@Class@@QEAA?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
SmallWithCtor thiscall_method_small_with_ctor() { return SmallWithCtor(); }
// LINUX: define {{.*}} void @_ZN5Class31thiscall_method_small_with_ctorEv(%struct.SmallWithCtor* noalias sret %agg.result, %class.Class* %this)
// WIN32: define {{.*}} x86_thiscallcc void @"?thiscall_method_small_with_ctor@Class@@QAE?AUSmallWithCtor@@XZ"(%class.Class* %this, %struct.SmallWithCtor* noalias sret %agg.result)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_small_with_ctor@Class@@QEAA?AUSmallWithCtor@@XZ"(%class.Class* %this, %struct.SmallWithCtor* noalias sret %agg.result)
Small __cdecl cdecl_method_small() { return Small(); }
// LINUX: define {{.*}} void @_ZN5Class18cdecl_method_smallEv(%struct.Small* noalias sret %agg.result, %class.Class* %this)
// WIN32: define {{.*}} void @"?cdecl_method_small@Class@@QAA?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
// WIN64: define linkonce_odr dso_local void @"?cdecl_method_small@Class@@QEAA?AUSmall@@XZ"(%class.Class* %this, %struct.Small* noalias sret %agg.result)
Big __cdecl cdecl_method_big() { return Big(); }
// LINUX: define {{.*}} void @_ZN5Class16cdecl_method_bigEv(%struct.Big* noalias sret %agg.result, %class.Class* %this)
// WIN32: define {{.*}} void @"?cdecl_method_big@Class@@QAA?AUBig@@XZ"(%class.Class* %this, %struct.Big* noalias sret %agg.result)
// WIN64: define linkonce_odr dso_local void @"?cdecl_method_big@Class@@QEAA?AUBig@@XZ"(%class.Class* %this, %struct.Big* noalias sret %agg.result)
void thiscall_method_arg(Empty s) {}
// LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE5Empty(%class.Class* %this)
// WIN32: define {{.*}} void @"?thiscall_method_arg@Class@@QAEXUEmpty@@@Z"(%class.Class* %this, %struct.Empty* byval(%struct.Empty) align 4 %s)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_arg@Class@@QEAAXUEmpty@@@Z"(%class.Class* %this, i8 %s.coerce)
void thiscall_method_arg(EmptyWithCtor s) {}
// LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE13EmptyWithCtor(%class.Class* %this)
// WIN32: define {{.*}} void @"?thiscall_method_arg@Class@@QAEXUEmptyWithCtor@@@Z"(%class.Class* %this, %struct.EmptyWithCtor* byval(%struct.EmptyWithCtor) align 4 %s)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_arg@Class@@QEAAXUEmptyWithCtor@@@Z"(%class.Class* %this, i8 %s.coerce)
void thiscall_method_arg(Small s) {}
// LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE5Small(%class.Class* %this, i32 %s.0)
// WIN32: define {{.*}} void @"?thiscall_method_arg@Class@@QAEXUSmall@@@Z"(%class.Class* %this, i32 %s.0)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_arg@Class@@QEAAXUSmall@@@Z"(%class.Class* %this, i32 %s.coerce)
void thiscall_method_arg(SmallWithCtor s) {}
// LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE13SmallWithCtor(%class.Class* %this, %struct.SmallWithCtor* byval(%struct.SmallWithCtor) align 4 %s)
// WIN32: define {{.*}} void @"?thiscall_method_arg@Class@@QAEXUSmallWithCtor@@@Z"(%class.Class* %this, i32 %s.0)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_arg@Class@@QEAAXUSmallWithCtor@@@Z"(%class.Class* %this, i32 %s.coerce)
void thiscall_method_arg(Big s) {}
// LINUX: define {{.*}} void @_ZN5Class19thiscall_method_argE3Big(%class.Class* %this, %struct.Big* byval(%struct.Big) align 4 %s)
// WIN32: define {{.*}} void @"?thiscall_method_arg@Class@@QAEXUBig@@@Z"(%class.Class* %this, %struct.Big* byval(%struct.Big) align 4 %s)
// WIN64: define linkonce_odr dso_local void @"?thiscall_method_arg@Class@@QEAAXUBig@@@Z"(%class.Class* %this, %struct.Big* %s)
};
void use_class() {
Class c;
c.thiscall_method_small();
c.thiscall_method_small_with_ctor();
c.cdecl_method_small();
c.cdecl_method_big();
c.thiscall_method_arg(Empty());
c.thiscall_method_arg(EmptyWithCtor());
c.thiscall_method_arg(Small());
c.thiscall_method_arg(SmallWithCtor());
c.thiscall_method_arg(Big());
}
struct X {
X();
~X();
};
void g(X) {
}
// WIN32: define dso_local void @"?g@@YAXUX@@@Z"(<{ %struct.X, [3 x i8] }>* inalloca %0) {{.*}} {
// WIN32: call x86_thiscallcc void @"??1X@@QAE@XZ"(%struct.X* {{.*}})
// WIN32: }
void f() {
g(X());
}
// WIN32: define dso_local void @"?f@@YAXXZ"() {{.*}} {
// WIN32-NOT: call {{.*}} @"??1X@@QAE@XZ"
// WIN32: }
namespace test2 {
// We used to crash on this due to the mixture of POD byval and non-trivial
// byval.
struct NonTrivial {
NonTrivial();
NonTrivial(const NonTrivial &o);
~NonTrivial();
int a;
};
struct POD { int b; };
int foo(NonTrivial a, POD b);
void bar() {
POD b;
b.b = 13;
int c = foo(NonTrivial(), b);
}
// WIN32-LABEL: define dso_local void @"?bar@test2@@YAXXZ"() {{.*}} {
// WIN32: %[[argmem:[^ ]*]] = alloca inalloca [[argmem_ty:<{ %"struct.test2::NonTrivial", %"struct.test2::POD" }>]]
// WIN32: getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 1
// WIN32: call void @llvm.memcpy
// WIN32: getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 0
// WIN32: call x86_thiscallcc %"struct.test2::NonTrivial"* @"??0NonTrivial@test2@@QAE@XZ"
// WIN32: call i32 @"?foo@test2@@YAHUNonTrivial@1@UPOD@1@@Z"([[argmem_ty]]* inalloca %argmem)
// WIN32: ret void
// WIN32: }
}
namespace test3 {
// Check that we padded the inalloca struct to a multiple of 4.
struct NonTrivial {
NonTrivial();
NonTrivial(const NonTrivial &o);
~NonTrivial();
int a;
};
void foo(NonTrivial a, bool b) { }
// WIN32-LABEL: define dso_local void @"?foo@test3@@YAXUNonTrivial@1@_N@Z"(<{ %"struct.test3::NonTrivial", i8, [3 x i8] }>* inalloca %0)
}
// We would crash here because the later definition of ForwardDeclare1 results
// in a different IR type for the value we want to store. However, the alloca's
// type will use the argument type selected by fn1.
struct ForwardDeclare1;
typedef void (*FnPtr1)(ForwardDeclare1);
void fn1(FnPtr1 a, SmallWithDtor b) { }
struct ForwardDeclare1 {};
void fn2(FnPtr1 a, SmallWithDtor b) { fn1(a, b); };
// WIN32-LABEL: define dso_local void @"?fn2@@YAXP6AXUForwardDeclare1@@@ZUSmallWithDtor@@@Z"
// WIN32: %[[a:[^ ]*]] = getelementptr inbounds [[argmem_ty:<{ {}\*, %struct.SmallWithDtor }>]], [[argmem_ty:<{ {}\*, %struct.SmallWithDtor }>]]* %{{.*}}, i32 0, i32 0
// WIN32: %[[a1:[^ ]*]] = bitcast {}** %[[a]] to void [[dst_ty:\(%struct.ForwardDeclare1\*\)\*]]*
// WIN32: %[[argmem:[^ ]*]] = alloca inalloca [[argmem_ty]]
// WIN32: %[[gep1:[^ ]*]] = getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 1
// WIN32: %[[bc1:[^ ]*]] = bitcast %struct.SmallWithDtor* %[[gep1]] to i8*
// WIN32: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %[[bc1]], i8* align 4 {{.*}}, i32 4, i1 false)
// WIN32: %[[a2:[^ ]*]] = load void [[dst_ty]], void [[dst_ty]]* %[[a1]], align 4
// WIN32: %[[gep2:[^ ]*]] = getelementptr inbounds [[argmem_ty]], [[argmem_ty]]* %[[argmem]], i32 0, i32 0
// WIN32: %[[addr:[^ ]*]] = bitcast {}** %[[gep2]] to void [[dst_ty]]*
// WIN32: store void [[dst_ty]] %[[a2]], void [[dst_ty]]* %[[addr]], align 4
// WIN32: call void @"?fn1@@YAXP6AXUForwardDeclare1@@@ZUSmallWithDtor@@@Z"([[argmem_ty]]* inalloca %[[argmem]])
namespace pr30293 {
// Virtual methods living in a secondary vtable take i8* as their 'this'
// parameter because the 'this' parameter on entry points to the secondary
// vptr. We used to have a bug where we didn't apply this rule consistently,
// and it would cause assertion failures when used with inalloca.
struct A {
virtual void f();
};
struct B {
virtual void __cdecl h(SmallWithDtor);
};
struct C final : A, B {
void g();
void __cdecl h(SmallWithDtor);
void f();
};
void C::g() { return h(SmallWithDtor()); }
// WIN32-LABEL: define dso_local x86_thiscallcc void @"?g@C@pr30293@@QAEXXZ"(%"struct.pr30293::C"* %this)
// WIN32: call x86_thiscallcc %struct.SmallWithDtor* @"??0SmallWithDtor@@QAE@XZ"
// WIN32: call void @"?h@C@pr30293@@UAAXUSmallWithDtor@@@Z"(<{ i8*, %struct.SmallWithDtor }>* inalloca %{{[^,)]*}})
// WIN32: declare dso_local void @"?h@C@pr30293@@UAAXUSmallWithDtor@@@Z"(<{ i8*, %struct.SmallWithDtor }>* inalloca)
// WIN64-LABEL: define dso_local void @"?g@C@pr30293@@QEAAXXZ"(%"struct.pr30293::C"* %this)
// WIN64: declare dso_local void @"?h@C@pr30293@@UEAAXUSmallWithDtor@@@Z"(i8*, i32)
}
|